Virginian 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class TA (Locobase 7485)

Data from VGN 8 - 1951 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 42996-42999 in June 1907.

This set of Ten-wheelers were built in a bunch in Richmond. Delivered as saturated steam engines with Stephenson valve gear, they were modified with Southern gear in 1919-1920; by then they had been fitted with relatively small 9" (229 mm) piston valves in the square-section steam chests that originally held slide valves. The profile had a pleasing assertiveness.

These engines were well-suited for mountain passenger service. As such, they survived into the late 1940s with 201-202 being retired in March 1949.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID7485
RailroadVirginian (VGN)
Number in Class6
Road Numbers200-203
Number Built
Valve GearSouthern
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.50 / 4.11
Engine Wheelbase (ft / m)24.58 / 7.49
Ratio of driving wheelbase to overall engine wheebase 0.55
Overall Wheelbase (engine & tender) (ft / m)57.79 / 17.61
Axle Loading (Maximum Weight per Axle) (lbs / kg)51,600 / 23,405
Weight on Drivers (lbs / kg)147,300 / 66,814
Engine Weight (lbs / kg)198,800 / 90,174
Tender Loaded Weight (lbs / kg)147,480 / 66,896
Total Engine and Tender Weight (lbs / kg)346,280 / 157,070
Tender Water Capacity (gals / ML)7000 / 26.52
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)12 / 10.90
Minimum weight of rail (calculated) (lb/yd / kg/m)82 / 41
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 1600
Boiler Pressure (psi / kPa)200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)21.5" x 26" / 546x660
Tractive Effort (lbs / kg)32,431 / 14710.47
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.54
Heating Ability
Firebox Area (sq ft / m2)190.30 / 17.69
Grate Area (sq ft / m2)56.20 / 5.22
Evaporative Heating Surface (sq ft / m2)2392 / 222.30
Superheating Surface (sq ft / m2)470 / 43.68
Combined Heating Surface (sq ft / m2)2862 / 265.98
Evaporative Heating Surface/Cylinder Volume218.94
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation11,240
Same as above plus superheater percentage13,038
Same as above but substitute firebox area for grate area44,150
Power L114,558
Power MT653.66

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Wes Barris